A high power diode-pumped composite YVO4/Nd:YVO4/YVO4 actively Q-switched and mode-locked laser with ring
resonator is demonstrated. For mode-locking operation, the maximum average output power at 1064 nm was up to 14.4
W at a pulse repetition frequency (PRF) of 85 kHz and at the incident pump power of 40 W, with the corresponding
optical conversion efficiency of 36%. The shortest mode-locked pulse width was obtained to be 117.1 picosecond (ps) at
the incident pump power of 26 W and PRF of 55 kHz, with the corresponding average output power of 7.37 W and the
linewidth of 0.0436 nm. The highest pulse energy and peak power were obtained to be 93.5 μJ and 0.362 MW at PRF of
5 kHz and incident pump power of 40W, respectively.

A 30-mm-length YVO4/Nd:YVO4/ YVO4 composite crystal was used as self-Raman gain material. Yellow
radiation at 587 nm was obtained by utilizing a 15-mm-length LBO as frequency-doubling crystal. The maximum
average power at 587 nm is up to 8.05 W at the pulse repetition rate of 50 kHz and the pump power of 65 W, with
the corresponding optical conversion efficiency of 12.38%. The shortest pulse width, the highest peak power and the
maximum pulse energy were measured to be 5.57 ns, 22.1 kW, and 161 μJ, respectively.

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